Haentjens may refer to:

• Alphonse-Alfred Haentjens (1824–1884), French industrialist and politician
• Brigitte Haentjens, Canadian theatre director
• Charles Haentjens (1821–1874), Haitian diplomat and politician
• Clément Haentjens (1847–1923), Haitian diplomat and politician
• Marcel Haëntjens (1869–1915), French croquet player and equestrian

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